My BMW K1100LT had a plug in the front tyre when I bought it, and I did thousands of miles on it, at speeds well over 100 MPH with no problems.
I ran over a screw on my FJR1300 (front tyre again) so I filled it with a water based tyre sealant before pulling out the screw, it blew a few bubbles before sealing but I just pumped it up and I did another 600+ miles before I got around to replacing both front and rear tyres, without any problems. It pissed Jeff off at the bike shop when green goop ran all over his tyre machine, but it did the job.
There's absolutely nothing wrong with erring on the side of caution and replacing the tyre straight away (not just installing a tube, tubes cause blow outs, tubeless tyres just go flat) but if moneys too tight to mention, a well installed plug should keep you out of trouble. Cheers, Terry.
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